Fix NPE issue with JSF/Portlet support

spring-faces/src/main/java/org/springframework/faces/webflow/context/portlet/PortletExternalContextImpl.java

@@ -308,11 +308,18 @@ public class PortletExternalContextImpl extends ExternalContext {
 
 	@Override
 	public String getRequestCharacterEncoding() {
-		return getActionRequest().getCharacterEncoding();
+		if (request instanceof ClientDataRequest) {
+			return ((ClientDataRequest) request).getCharacterEncoding();
+		}
+		else {
+			Assert.state(response instanceof MimeResponse);
+			return ((MimeResponse) response).getCharacterEncoding();
+		}
 	}
 
 	public void setRequestCharacterEncoding(String encoding) throws java.io.UnsupportedEncodingException {
-		getActionRequest().setCharacterEncoding(encoding);
+		Assert.isInstanceOf(ClientDataRequest.class, request);
+		((ClientDataRequest) request).setCharacterEncoding(encoding);
 	}
 
 	@Override
@@ -365,11 +372,6 @@ public class PortletExternalContextImpl extends ExternalContext {
 		return requestParameterValuesMap;
 	}
 
-	@Override
-	public String getRequestPathInfo() {
-		return null;
-	}
-
 	@Override
 	public String getRequestServletPath() {
 		// Return "" instead of null in order to prevent NullPointerException in Apache MyFaces 1.2 when it tries to
@@ -379,7 +381,13 @@ public class PortletExternalContextImpl extends ExternalContext {
 		// Alternatively this method could be implemented to provide an actual servlet path derived from the
 		// viewId when that becomes available during rendering as the MyFaces Portlet Bridge does.
 		//
-		return (JsfRuntimeInformation.isMyFacesPresent()) ? "" : null;
+//		return JsfRuntimeInformation.isMyFacesPresent() ? "" : null;
+		return "";
+	}
+
+	@Override
+	public String getRequestPathInfo() {
+		return "";
 	}
 
 	public int getRequestContentLength() {
@@ -387,11 +395,6 @@ public class PortletExternalContextImpl extends ExternalContext {
 		return ((ClientDataRequest) request).getContentLength();
 	}
 
-	private ActionRequest getActionRequest() {
-		Assert.isInstanceOf(ActionRequest.class, request);
-		return (ActionRequest) request;
-	}
-
 	@Override
 	public String getAuthType() {
 		return request.getAuthType();

spring-faces/src/main/java/org/springframework/faces/webflow/context/portlet/PortletFacesContextImpl.java

@@ -61,7 +61,7 @@ import org.springframework.util.ObjectUtils;
  * implementation provides an alternative that accepts Portlet request and response structures and creates a
  * {@link PortletExternalContextImpl} in its constructor. The rest of the method implementations mimic the equivalent
  * methods in the default FacesContext implementation.
- * 
+ *
  * @author Rossen Stoyanchev
  * @author Phillip Webb
  * @since 2.2.0
@@ -119,8 +119,9 @@ public class PortletFacesContextImpl extends FacesContext {
 		application = JsfUtils.findFactory(ApplicationFactory.class).getApplication();
 		renderKitFactory = JsfUtils.findFactory(RenderKitFactory.class);
 		this.externalContext = new PortletExternalContextImpl(portletContext, portletRequest, portletResponse);
-		this.exceptionHandler = JsfUtils.findFactory(ExceptionHandlerFactory.class).getExceptionHandler();
 		FacesContext.setCurrentInstance(this);
+		// This depends on the current FacesContext instance
+		this.exceptionHandler = JsfUtils.findFactory(ExceptionHandlerFactory.class).getExceptionHandler();
 	}
 
 	public void release() {